/* ============================================================
   三亿体育 · 共享外壳样式 /assets/site.css
   夜间主场声浪 + 数据仪表盘：深海蓝托底，荧光橙主行动，电光青做刻度
   ============================================================ */

:root{
  --navy-900:#06182B;
  --navy-700:#0B2A47;
  --navy-500:#123F66;
  --grass-500:#2FBF71;
  --grass-700:#187A4A;
  --orange-500:#FF6B1A;
  --orange-300:#FFA45C;
  --cyan-400:#24E0D6;
  --mist:#F5F8FB;
  --steel:#8FA3B8;
  --alert:#FF5A5F;

  --glass:rgba(18,63,102,.50);
  --glass-strong:rgba(18,63,102,.78);
  --line:rgba(143,163,184,.22);
  --line-cyan:rgba(36,224,214,.24);

  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --radius:14px;
  --radius-sm:8px;
  --shell:1280px;
  --prose:720px;
  --nav-h:70px;
  --s3-progress:0;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
*{margin:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  min-height:100vh;
  background:
    radial-gradient(1200px 520px at 84% -10%, rgba(36,224,214,.10), transparent 62%),
    radial-gradient(900px 460px at 4% 2%, rgba(255,107,26,.09), transparent 64%),
    var(--navy-900);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.72;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%}
ul,ol{list-style:none}
a{color:var(--cyan-400);text-decoration:none}
a:hover{color:var(--orange-300)}
button{font:inherit;color:inherit}
::selection{background:var(--orange-500);color:var(--navy-900)}
:focus-visible{outline:2px solid var(--cyan-400);outline-offset:3px;border-radius:2px}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.02em;
  transform:skewX(-2deg);
  transform-origin:left bottom;
}
p{line-height:1.75}
strong{font-weight:700;color:var(--orange-300)}
small{font-size:13px;color:var(--steel)}

/* ---------- 布局 ---------- */
.s3-container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,44px);
}
.s3-grid{
  display:grid;
  gap:clamp(18px,2.4vw,32px);
  grid-template-columns:repeat(12,minmax(0,1fr));
}
.s3-grid > *{grid-column:span 12;min-width:0}
@media (min-width:860px){
  .s3-grid--7-5 > *:nth-child(1){grid-column:span 7}
  .s3-grid--7-5 > *:nth-child(2){grid-column:span 5}
  .s3-grid--4-8 > *:nth-child(1){grid-column:span 4}
  .s3-grid--4-8 > *:nth-child(2){grid-column:span 8}
}
.s3-prose{max-width:var(--prose)}
.s3-prose h2{font-size:clamp(26px,3vw,40px);margin:1.6em 0 .55em}
.s3-prose h3{font-size:clamp(20px,2vw,26px);margin:1.5em 0 .5em}
.s3-prose p{margin:0 0 1.1em}
.s3-prose ul,.s3-prose ol{margin:0 0 1.2em;padding-left:1.3em}
.s3-prose ul li{list-style:none;position:relative;padding-left:18px;margin-bottom:.45em}
.s3-prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;background:var(--orange-500);transform:skewX(-10deg)}
.s3-prose ol{counter-reset:s3num}
.s3-prose ol li{list-style:none;counter-increment:s3num;position:relative;padding-left:32px;margin-bottom:.5em}
.s3-prose ol li::before{content:counter(s3num,decimal-leading-zero);position:absolute;left:0;top:.1em;font-family:var(--font-mono);font-size:13px;color:var(--cyan-400)}

/* ---------- 章节头 / 索引 ---------- */
.s3-section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px 16px;
  margin-bottom:clamp(18px,2.4vw,30px);
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.s3-section-head > h2,.s3-section-head > h3{flex:1 1 240px;font-size:clamp(24px,2.8vw,40px)}
.s3-index{
  font-family:var(--font-mono);
  font-weight:300;
  font-size:13px;
  letter-spacing:.2em;
  color:var(--steel);
}
.s3-eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.s3-data{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  font-size:clamp(28px,4vw,52px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--orange-500);
}

/* ---------- 按钮 ---------- */
.s3-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.s3-btn--solid{background:var(--orange-500);color:var(--navy-900)}
.s3-btn--solid:hover{background:var(--orange-300);color:var(--navy-900);transform:translateY(-2px)}
.s3-btn--ghost{background:rgba(18,63,102,.35);border-color:var(--line-cyan);color:var(--mist)}
.s3-btn--ghost:hover{border-color:var(--cyan-400);color:var(--cyan-400);transform:translateY(-2px)}

/* ---------- 卡片 / 标签 ---------- */
.s3-card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.2vw,26px);
  backdrop-filter:blur(10px);
  transition:transform .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.s3-card:hover{transform:translateY(-3px);border-color:var(--line-cyan);background:var(--glass-strong)}
.s3-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:999px;
  border:1px solid var(--line-cyan);
  background:rgba(36,224,214,.10);
  color:var(--cyan-400);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.5;
}

/* ---------- 面包屑 ---------- */
.s3-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:18px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--steel);
}
.s3-crumb{color:var(--steel);text-decoration:none;transition:color .2s var(--ease)}
.s3-crumb:hover{color:var(--cyan-400)}
.s3-crumb[aria-current="page"]{color:var(--mist)}
.s3-breadcrumb__sep{color:rgba(143,163,184,.45)}

/* ---------- 媒体容器（页面阶段放图） ---------- */
.s3-media{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(155deg,var(--navy-500),var(--navy-900) 74%);
}
.s3-media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16/10;
  filter:saturate(.94) contrast(1.05);
}
.s3-media--wide .s3-media__img{aspect-ratio:21/9}
.s3-media--tall .s3-media__img{aspect-ratio:4/5}
.s3-media__cap{
  position:absolute;
  inset-inline:0;
  bottom:0;
  padding:14px 16px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
  background:linear-gradient(transparent,rgba(6,24,43,.9));
}

/* ---------- 跳转链接 ---------- */
.s3-skip{
  position:fixed;
  top:0;
  left:50%;
  z-index:200;
  transform:translate(-50%,-140%);
  padding:11px 20px;
  border-radius:0 0 12px 12px;
  background:var(--cyan-400);
  color:var(--navy-900);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transition:transform .2s var(--ease);
}
.s3-skip:focus{transform:translate(-50%,0);color:var(--navy-900)}

/* ============================================================
   页头
   ============================================================ */
.s3-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(6,24,43,.97),rgba(6,24,43,.86));
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.s3-header[data-shrink]{box-shadow:0 18px 40px -26px rgba(0,0,0,.95)}
.s3-header__meter{
  position:absolute;
  top:0;
  inset-inline:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan-400),var(--orange-500));
  transform:scaleX(var(--s3-progress));
  transform-origin:left center;
  transition:transform .1s linear;
  pointer-events:none;
}
.s3-header__edge{
  position:absolute;
  inset-inline:0;
  bottom:0;
  height:3px;
  background:repeating-linear-gradient(90deg,rgba(36,224,214,.55) 0 1px,transparent 1px 28px);
  opacity:.45;
  pointer-events:none;
}

/* 上层信息条 */
.s3-topbar{
  max-height:52px;
  overflow:hidden;
  background:rgba(11,42,71,.62);
  border-bottom:1px solid rgba(143,163,184,.14);
  transition:max-height .3s var(--ease),opacity .3s var(--ease);
}
.s3-header[data-shrink] .s3-topbar{max-height:0;opacity:0}
.s3-topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:44px;
}
.s3-topbar__line{
  margin:0;
  min-width:0;
  font-size:13px;
  color:var(--steel);
  letter-spacing:.02em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.s3-quick{display:flex;align-items:center;gap:6px;flex:none}
.s3-quick__link{
  padding:5px 12px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:13px;
  font-weight:500;
  color:var(--mist);
  text-decoration:none;
  white-space:nowrap;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.s3-quick__link:hover{background:rgba(36,224,214,.12);border-color:var(--line-cyan);color:var(--cyan-400)}
.s3-quick__link--solid{
  background:rgba(255,107,26,.16);
  border-color:rgba(255,107,26,.5);
  color:var(--orange-300);
  font-weight:700;
}
.s3-quick__link--solid:hover{background:var(--orange-500);border-color:var(--orange-500);color:var(--navy-900)}

/* 下层栏目条 */
.s3-navbar{position:relative}
.s3-navbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(16px,3vw,40px);
  min-height:var(--nav-h);
}
.s3-brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--mist);flex:none}
.s3-brand:hover{color:var(--mist)}
.s3-brand__mark{
  position:relative;
  width:36px;
  height:36px;
  flex:none;
  border-radius:4px;
  background:var(--orange-500);
  transform:skewX(-8deg);
  box-shadow:0 0 0 1px rgba(255,163,92,.42),0 10px 24px -14px rgba(255,107,26,.95);
}
.s3-brand__mark::after{
  content:"";
  position:absolute;
  inset:9px 11px;
  background:repeating-linear-gradient(90deg,var(--navy-900) 0 2px,transparent 2px 5px);
}
.s3-brand__text{display:flex;flex-direction:column;line-height:1.12}
.s3-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:-.01em;
  transform:skewX(-2deg);
  transform-origin:left center;
}
.s3-brand__sub{
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--steel);
}

.s3-nav__list{display:flex;align-items:center;gap:clamp(14px,2vw,30px)}
.s3-nav__item{position:relative}
.s3-nav__link{
  position:relative;
  display:inline-block;
  padding:10px 2px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.03em;
  color:var(--mist);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.s3-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:2px;
  height:2px;
  background:var(--cyan-400);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.s3-nav__link:hover{color:var(--cyan-400)}
.s3-nav__link:hover::after{transform:scaleX(1)}
.s3-nav__link[aria-current="page"]{color:var(--orange-300)}
.s3-nav__link[aria-current="page"]::after{background:var(--orange-500);transform:scaleX(1)}

.s3-nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border-radius:999px;
  border:1px solid var(--line-cyan);
  background:rgba(18,63,102,.55);
  color:var(--mist);
  font-size:14px;
  font-weight:700;
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.s3-nav-toggle:hover{border-color:var(--cyan-400);background:rgba(18,63,102,.8)}
.s3-nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:18px;height:14px}
.s3-nav-toggle__bars span{
  display:block;
  height:2px;
  background:var(--orange-500);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.s3-nav-toggle__label{font-size:13px;letter-spacing:.1em}
.s3-header[data-open] .s3-nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.s3-header[data-open] .s3-nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ============================================================
   页脚
   ============================================================ */
.s3-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  padding-block:clamp(44px,6vw,78px) 28px;
  background:linear-gradient(180deg,rgba(4,16,29,.55),var(--navy-900) 42%);
  border-top:1px solid var(--line-cyan);
}
.s3-footer__wave{
  position:absolute;
  inset-inline:0;
  top:-1px;
  height:6px;
  background:
    repeating-linear-gradient(90deg,var(--cyan-400) 0 1px,transparent 1px 10px),
    repeating-linear-gradient(90deg,var(--orange-500) 0 3px,transparent 3px 62px);
  opacity:.5;
  pointer-events:none;
}
.s3-footer__masthead{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:16px 28px;
  padding-bottom:clamp(26px,3vw,38px);
  border-bottom:1px solid var(--line);
}
.s3-footer__brand{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(30px,4.4vw,54px);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--mist);
  transform:skewX(-2deg);
  transform-origin:left bottom;
}
.s3-footer__brandline{
  margin:0;
  flex:1 1 220px;
  font-size:15px;
  color:var(--steel);
}
.s3-footer__masthead .s3-btn{flex:none}

.s3-footer__grid{
  display:grid;
  gap:clamp(22px,3vw,42px);
  grid-template-columns:repeat(3,minmax(0,1fr)) 1.35fr;
  padding-block:clamp(28px,3.4vw,44px);
}
.s3-footer__col{min-width:0}
.s3-footer__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-weight:500;
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-400);
  transform:none;
}
.s3-footer__list{display:grid;gap:9px}
.s3-footer__link{
  color:var(--mist);
  font-size:14.5px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.s3-footer__link:hover{color:var(--orange-300);border-bottom-color:rgba(255,163,92,.6)}
.s3-footer__col--contact{
  padding:clamp(16px,2vw,22px);
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:rgba(18,63,102,.42);
}
.s3-footer__note{
  margin:12px 0 2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--steel);
}
.s3-footer__note:first-of-type{margin-top:0}
.s3-footer__value{
  margin:0;
  font-size:14.5px;
  line-height:1.5;
  color:var(--mist);
  font-family:var(--font-mono);
  word-break:break-word;
}
.s3-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.s3-footer__legal-list{display:flex;flex-wrap:wrap;gap:18px}
.s3-footer__legal-link{font-size:13.5px;color:var(--steel);text-decoration:none;transition:color .2s var(--ease)}
.s3-footer__legal-link:hover{color:var(--cyan-400)}
.s3-footer__icp{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--steel);
}
.s3-footer__copy{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:rgba(143,163,184,.75);
}

/* ============================================================
   显现协议
   ============================================================ */
.js-ready .s3-reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.js-ready .s3-reveal.is-visible{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .s3-nav__list{gap:14px}
  .s3-nav__link{font-size:14px}
  .s3-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  :root{--nav-h:62px}
  .s3-nav-toggle{display:inline-flex}
  .s3-brand__sub{display:none}
  .s3-brand__name{font-size:18px}
  .s3-topbar__inner{min-height:40px}
  .s3-topbar__line{max-width:46%;font-size:12px}
  .s3-quick{gap:4px}
  .s3-quick__link{padding:4px 9px;font-size:12px}

  .s3-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    padding:10px clamp(18px,4vw,44px) 22px;
    background:linear-gradient(180deg,rgba(11,42,71,.99),rgba(6,24,43,.99));
    border-bottom:1px solid var(--line-cyan);
    box-shadow:0 26px 44px -30px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .s3-header[data-open] .s3-nav{opacity:1;visibility:visible;transform:none}
  .s3-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .s3-nav__item{border-bottom:1px solid rgba(143,163,184,.14)}
  .s3-nav__item:last-child{border-bottom:0}
  .s3-nav__link{display:block;padding:14px 4px;font-size:16px}
  .s3-nav__link::after{left:0;right:auto;bottom:9px;width:24px}
}

@media (max-width:640px){
  body{font-size:16px}
  .s3-topbar__line{display:none}
  .s3-topbar__inner{justify-content:flex-end}
  .s3-footer__grid{grid-template-columns:1fr}
  .s3-footer__masthead{align-items:flex-start}
  .s3-footer__masthead .s3-btn{width:100%}
  .s3-footer__brandline{flex-basis:100%}
  .s3-footer__legal{flex-direction:column;align-items:flex-start;gap:10px}
  .s3-card{padding:18px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js-ready .s3-reveal{opacity:1;transform:none}
  .s3-card:hover,.s3-btn:hover{transform:none}
}